How precisely Donald Trump could make good on his threat to annex Canada can be found in the U.S. Constitution. There is both potential and precedent in American history.

After teasing the "dawn of America's golden age", the US President-elect has shared a new map of the United States, which incorporates Canada as its territory. This comes hours after Mr Trump ...

President-elect Trump on Tuesday again suggested that Canada should be added ... on Tuesday night — one with a map of the U.S. and Canada with "United States" written across the two countries ...